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Houlder Ltd to design BOG reliquefaction plant for Avenir LNG bunkering vessel “Avenir Achievement”

26 Jul 2022

Houlder Ltd on Monday (26 July) said it was awarded the detailed design and engineering for the retrofit of an Air Liquide Boil-Off Gas (BOG) reliquefaction plant by Avenir LNG for its LNG bunker vessel, Avenir Achievement.

The work follows the successful completion of basic design and engineering by Houlder in Q1 of 2022.

Installation of the plant is planned for the end of 2022 ahead of the vessel’s first long-term charter with Shell in Q1 of 2023. 

The new TBF700 plant has capacity to reliquefy up to 1Te of BOG per hour, said Houlder in a social media post. 

“The system shall allow Avenir Achievement to maintain its LNG cargo at a low temperature, avoiding ‘LNG ageing’ and maintaining cargo characteristics when bunkering.”

“The system shall prevent losses during idle periods, permitting reliquefication of received cargo vapour after bunkering operations, further reducing wasted cargo and greenhouse gas emissions.”

According to Houlder’s website, the scope of work for the design and engineering for the retrofit of the BOG reliquefaction plant are:

  • Design of new structural modifications and foundations for equipment, including Modification of existing vessel deck house to fit TBF700 and subdivided electrical equipment compartment 
  • Design of new power supplies, switchboard and cabling
  • Design of new LNG pipework interfaces and valve controls 
  • Design of new freshwater & seawater cooling system and pipework
  • Design of HVAC system for new electrical equipment room
  • Complete Class approval package
  • Shipyard Conversion Specification

Houlder have previously completed detailed design and engineering for the installation of five other Air Liquide reliquefaction plants onto LNG carriers.

Related: Shell to charter 20,000 cbm LNG bunkering vessel “Avenir Achievement” from Avenir LNG


Photo credit: Houlder Ltd
Published: 26 July, 2022

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